CN115704743A - Sampling device and method - Google Patents

Abstract

The embodiment of the application discloses a sampling device and a method. The main sampling unit comprises a first sampling channel, a first current limiter and a first sensor, wherein the first current limiter is arranged on the first sampling channel, and the first sensor is arranged on the first sampling channel and positioned below the first current limiter and used for acquiring a first index signal of fluid passing through the first sampling channel; the standby sampling unit comprises a second sampling channel, a second current limiter and a second sensor, wherein the second current limiter is arranged on the second sampling channel, and the second sensor is arranged on the second sampling channel and is positioned below the second current limiter and used for obtaining a second index signal of the fluid passing through the second sampling channel; the controller is in signal connection with the first sensor and/or the second sensor, and the controller controls the conduction state of the main sampling unit and/or the standby sampling unit according to the first index signal and/or the second index signal.

Description

Sampling device and method

Technical Field

The embodiment of the application relates to the technical field of equipment, in particular to a sampling device and a sampling method.

Background

In the related art, a sampling device is used to sample the material so as to convey the material to a subsequent device for operations such as monitoring, processing and the like. In order to control the flow of material into the subsequent equipment, a flow restrictor is typically provided in the sampling device. However, the flow restrictor is easily blocked by the material or impurities in the material, thereby causing abnormality of the subsequent equipment, resulting in increased maintenance cost of the equipment and affecting utilization rate of the equipment.

Disclosure of Invention

The embodiment of the application provides a sampling device and a sampling method.

According to some embodiments, a first aspect of the present application provides a sampling device comprising a main sampling unit, a spare sampling unit, and a controller. The main sampling unit comprises a first sampling channel, a first current limiter and a first sensor, wherein the first current limiter is arranged on the first sampling channel, and the first sensor is arranged on the first sampling channel and is positioned below the first current limiter and used for obtaining a first index signal of fluid passing through the first sampling channel; the standby sampling unit comprises a second sampling channel, a second current limiter and a second sensor, wherein the second current limiter is arranged on the second sampling channel, and the second sensor is arranged on the second sampling channel and is positioned below the second current limiter and used for obtaining a second index signal of the fluid passing through the second sampling channel; the controller is in signal connection with the first sensor and/or the second sensor, and the controller controls the conduction state of the main sampling unit and/or the standby sampling unit according to the first index signal and/or the second index signal.

According to some embodiments of the present application, the sampling device further comprises a first cleaning assembly disposed on the first sampling channel and below the first flow restrictor, and a first discharge channel disposed on the first sampling channel and above the first flow restrictor, the first cleaning assembly in signal connection with the controller.

According to some embodiments of the present application, the sampling device further comprises a fifth valve disposed on the first discharge passage and in signal connection with the controller.

According to some embodiments of the present application, the primary sampling unit further comprises a first valve and a second valve disposed on the first sampling channel, the first valve disposed above the first flow restrictor, the second valve disposed below the first sensor.

According to some embodiments of the present application, the first valve and the second valve are each in signal connection with the controller.

According to some embodiments of the present application, the sampling device further comprises a second purge assembly disposed on the second sampling channel and below the second flow restrictor, and a second exhaust channel disposed on the second sampling channel and above the second flow restrictor, the second purge assembly in signal connection with the controller.

According to some embodiments of the present application, the sampling device further comprises a sixth valve disposed on the second vent passage and in signal connection with the controller.

According to some embodiments of the present application, the redundant sampling unit further comprises a third valve and a fourth valve disposed on the second sampling channel, the third valve disposed above the second flow restrictor, the fourth valve disposed below the second sensor.

According to some embodiments of the present application, the third valve and the fourth valve are each in signal connection with the controller.

According to some embodiments of the application, the first indicator signal and/or the second indicator signal comprises a pressure signal and/or a flow signal.

According to some embodiments of the present application, the sampling device further comprises a heating assembly disposed on the first sampling channel and/or the second sampling channel, the heating assembly in signal connection with the controller.

According to some embodiments of the present application, the heating assembly is disposed below the first and/or second flow restrictors.

According to some embodiments of the present application, one end of the first sampling channel has a first sampling port, and the distance between the first flow restrictor and the first sampling port is between 9cm and 11cm; and/or the presence of a gas in the gas,

one end of the second sampling channel is provided with a second sampling port, and the distance between the second current limiter and the second sampling port is 9-11 cm.

According to some embodiments, the present application provides a sampling method applied to any one of the above sampling apparatuses, the sampling method including:

introducing a sample into the sampling device, starting the main sampling unit and closing the standby sampling unit;

the method comprises the steps that a first sensor sends a first index signal of a sample in a main sampling unit to a controller, and when the first index signal does not accord with a threshold value, the controller closes the main sampling unit and opens a standby sampling unit;

and the controller controls the conduction state of the standby sampling unit according to the second index signal of the standby sampling unit.

According to some embodiments of the application, the method further comprises:

when the first index signal does not meet a threshold value, the controller controls the first cleaning assembly to clean the main sampling unit.

According to some embodiments of the present application, the controller controls the first cleaning assembly to clean the main sampling unit when the first indicator signal does not meet a threshold, including:

closing the first valve, the second valve and the fifth valve, and controlling the first cleaning assembly to supply cleaning fluid to the first sampling channel;

starting the heating assembly;

the fifth valve is opened and the cleaning fluid and the blockage are discharged from the first discharge passage.

According to some embodiments of the present application, the controller controls the on state of the spare sampling unit according to a second index signal of the spare sampling unit, including:

closing the main sampling unit and opening the standby sampling unit;

and when the second index signal does not meet the threshold value, the controller closes the standby sampling unit.

According to some embodiments of the application, the method further comprises:

and when the second index signal does not meet the threshold value, the controller controls the second cleaning assembly to clean the standby sampling unit.

According to some embodiments of the present application, the controller controls the second cleaning assembly to clean the spare sampling unit when the second indicator signal does not meet a threshold, including:

closing the third valve, the fourth valve and the sixth valve, and controlling the second cleaning assembly to supply cleaning fluid to the second sampling channel;

starting the heating assembly;

the sixth valve is opened and the cleaning fluid and the blockage are discharged from the second discharge passage.

One embodiment of the above application has at least the following advantages or benefits:

according to the sampling device and the method, the standby sampling unit is added, so that when the first current limiter of the main sampling unit is blocked, the standby sampling unit can be started, the main sampling unit is closed, and the sampling operation can be continued. Compared with the manner of replacing parts in the related art, the sampling device provided by the embodiment of the application can improve the problem of equipment abnormity caused by blockage of the current limiter.

Drawings

In order to more clearly illustrate the embodiments of the present application or technical solutions in the conventional technology, the drawings needed to be used in the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 shows a schematic diagram of a sampling device according to an embodiment of the present application.

Fig. 2 is a flowchart illustrating a sampling method according to an embodiment of the present application.

Wherein the reference numerals are as follows:

200. main sampling unit 210 and first sampling channel

211. First cleaning section 212, first sampling port

220. First current limiter 230, first sensor

250. First discharge passage 261, first valve

262. Second valve 263, fifth valve

400. Spare sampling unit 410, second sampling channel

411. Second cleaning section 412, second sampling port

420. Second flow restrictor 430, second sensor

450. Second discharge passage 461, third valve

462. Fourth valve 463, sixth valve

610. First cleaning assembly 611, first storage tank

612. First pump 620 and second cleaning assembly

621. A second storage tank 622, a second pump

800. Heating assembly 900, apparatus

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

As described in the background art, some sampling devices provided with a flow restrictor are relatively easy to be blocked by the sampling material due to the small flow area of the flow restrictor during sampling. Under the condition that the flow restrictor is blocked, index signals of materials in the sampling device, such as pressure, flow and the like, are abnormal, so that equipment behind the sampling device is abnormal, and a downtime phenomenon is caused.

In the related art, in order to solve the downtime problem, parts are usually replaced, which increases the maintenance cost of the equipment. Meanwhile, the replacement of parts can increase the maintenance time, thereby affecting the utilization rate of the equipment.

Based on this, the embodiments of the present application provide a sampling apparatus and method.

As shown in fig. 1, fig. 1 is a schematic diagram of a sampling apparatus according to an embodiment of the present application. The sampling device of the embodiment of the present application includes a main sampling unit 200, a standby sampling unit 400, and a controller (not shown in the figure). The main sampling unit 200 includes a first sampling channel 210, a first restrictor 220 and a first sensor 230, the first restrictor 220 is disposed on the first sampling channel 210 to limit the flow rate of the fluid passing through the first sampling channel 210, the first sensor 230 is disposed on the first sampling channel 210 and below the first restrictor 220 to obtain a first index signal of the fluid passing through the first sampling channel 210. The spare sampling unit 400 includes a second sampling channel 410, a second restrictor 420, and a second sensor 430, the second restrictor 420 being disposed on the second sampling channel 410 to restrict the flow of fluid through the second sampling channel 410. A second sensor is disposed on the second sampling channel 410 below the second restrictor 420 to obtain a second indicator signal of the fluid passing through the second sampling channel 410. The controller is in signal connection with the first sensor 230 and/or the second sensor 430, and controls the conducting state of the main sampling unit 200 and/or the standby sampling unit 400 according to the first index signal and/or the second index signal

The sampling device according to the embodiment of the application, by adding the standby sampling unit 400, when the first current limiter 220 of the main sampling unit 200 is blocked, the standby sampling unit 400 can be enabled, and the main sampling unit 200 can be turned off, so that the sampling operation can be continued. Compared with the mode of replacing parts in the related art, the sampling device of the embodiment of the application can improve the problem of equipment abnormity caused by blockage of the current limiter.

In order to make the aforementioned objects, features and advantages of the present application comprehensible, specific embodiments accompanied with figures are described in detail below.

It should be noted that the positional relationship such as "above" or "below" in the present application is described with reference to the fluid flow direction in the pipe, for example, the upstream in the fluid flow direction is above, and the downstream in the fluid flow direction is below.

In addition, in the present application, the terms "disposed on" \8230 ";" above ", and the like are used for convenience in describing a connection relationship between one element or component and another element or component shown in the drawings, and a positional relationship between the elements or components should not be limited.

With continued reference to fig. 1, the main sampling unit 200 and the backup sampling unit 400 may each be connected to a device 900, and the device 900 may perform operations such as testing, processing, etc. on the fluid delivered through the main sampling unit 200 and the backup sampling unit 400. For example, the apparatus 900 may be a negative pressure detection device, and the gas in the exposure machine is collected by the main sampling unit 200 and the standby sampling unit 400, but the type of the apparatus is not limited to the negative pressure detection device.

The first sampling channel 210 of the primary sampling unit 200 and the second sampling channel 410 of the backup sampling unit 400 may each be independently in communication with the device 900 to deliver fluid to the device 900, respectively. Of course, the first sampling channel 210 and the second sampling channel 410 may also be in communication and connected to the device 900 via a common channel 910.

In this embodiment, the first sampling channel 210 and the second sampling channel 410 are in communication with each other and are connected to the apparatus 900 via a common channel 910.

When the first indicator signal meets the threshold, it can be determined that the first current limiter 220 of the main sampling unit 200 is not blocked or the blocking condition is within the allowable range, and at this time, sampling can be continuously performed through the first sampling channel 210, and the standby sampling unit 400 is turned off.

When the first indicator signal does not meet the threshold, it can be determined that the first current limiter 220 of the main sampling unit 200 is blocked and the blocking condition exceeds the allowable range, and at this time, the controller turns off the main sampling unit 200 and turns on the standby sampling unit 400. Sampling continues with the spare sampling unit 400 to ensure proper operation of the device 900. When the first current limiter 220 is blocked and the blocking condition exceeds the allowable range, in order to avoid the blocking condition from affecting the normal operation of the device 900, for example, causing the device 900 to be down, the standby sampling unit 400 is activated, and the main sampling unit 200 is deactivated. By adding the spare sampling unit 400, a fault-tolerant effect can be achieved.

It is understood that the fluid collected by the primary and backup sampling units 200, 400 may be a gas or a liquid.

Further, the first indicator signal obtained by the first sensor 230 may include a pressure signal and/or a flow signal.

Note that a gas or a liquid doped with a small amount of solid impurities is also understood as a fluid in the embodiment of the present application.

With continued reference to fig. 1, the sampling device further includes a first cleaning assembly 610 and a first discharge passage 250. The first cleaning component 610 is disposed on the first sampling channel 210 and below the first flow restrictor 220, the first discharge channel 250 is disposed on the first sampling channel 210 and above the first flow restrictor 220, and the first cleaning component 610 is in signal connection with the controller.

The first washing assembly 610 may include a first storage tank 611 and a first pump 612, the first storage tank 611 being connected to the first pump 612, the first pump 612 being connected to the first sampling passage 210. The first storage tank 611 may store therein a cleaning fluid, such as a cleaning liquid or gas. The fluid in the first storage tank 611 is delivered to the first sampling passage 210 by the action of the first pump 612 for a cleaning action.

When the first indicator signal does not meet the threshold, the controller controls the first purging assembly 610 to supply a purging fluid into the first sampling channel 210 to purge the first restrictor 220 and/or the first sampling channel 210 to restore the first indicator signal to a threshold-meeting state. As an example, the cleaning fluid may be a liquid, and may reduce adhesion of the blockage within the first restrictor 220, thereby performing a function of dredging the pipe.

The first discharge channel 250 is disposed on the first sampling channel 210 and communicates with the first sampling channel 210 to discharge the cleaning fluid and the clogging substance. The first discharge passage 250 is further provided with a fifth valve 263, and the fifth valve 263 is in signal connection with the controller. When the first discharge passage 250 discharges the cleaning fluid and the blockages, the fifth valve 263 is in an open state. When the first exhaust passage 250 does not need to exhaust the cleaning fluid and the blockages, the fifth valve 263 is in a closed state.

The main sampling unit 200 further includes a first valve 261 and a second valve 262, and the first valve 261 and the second valve 262 are disposed on the first sampling channel 210. The first valve 261 is disposed above the first restrictor 220, and the second valve 262 is disposed below the first sensor 230. Meanwhile, the first and second valves 261 and 262 separate the first sampling channel 210 into the first washing section 211. The first restrictor 220 and the first sensor 230 are both disposed in the first cleaning zone 211.

The first valve 261 and the second valve 262 are both in signal connection with the controller.

When the first index signal does not meet the threshold, the controller controls the first cleaning component 610 to clean the main sampling unit 200. Specifically, the controller closes the first valve 261, the second valve 262, and the fifth valve 263 such that the first sampling channel 210 is divided into the first washing section 211 between the first valve 261 and the second valve 262. The controller then controls the first cleaning assembly 610 to operate to supply a cleaning fluid into the first cleaning zone 211, which can unblock the first restrictor 220. After the cleaning is completed, the fifth valve 263 is opened, and the cleaning fluid and the blockage can be discharged from the first discharge channel 250 in time, so that the first flow restrictor 220 is restored to the conducting state.

As described above, when the first indicator signal does not meet the threshold, the controller turns off the main sampling unit 200 and turns on the standby sampling unit 400. The second sensor 430 may also monitor a second indicator signal of the fluid as it is being delivered to the device 900 through the second sampling channel 410. When the second index signal meets the threshold, the spare sampling unit 400 may be used for sampling all the time, and the sampling unit 200 may be turned off. When the second indicator signal does not meet the threshold value, that is, the second current limiter 420 is blocked and the blocking condition exceeds the allowable range, in order to avoid the blocking condition from affecting the normal operation of the device 900, the controller turns off the standby sampling unit 400 and turns on the main sampling unit 200 again. At this time, the first restrictor 220 of the main sampling unit 200 has been cleaned and unclogged by the first cleaning component 610.

It is understood that the second indicator signal acquired by the second sensor 430 may include a pressure signal and/or a flow signal.

It should be noted that the index signals acquired by the first sensor 230 and the second sensor 430 may be the same or different. For example, the index signals acquired by the first sensor 230 and the second sensor 430 are both pressure signals of the fluid; or acquiring flow signals of the fluid; alternatively, one of the first sensor 230 and the second sensor 430 obtains a pressure signal of the fluid and the other obtains a flow signal of the fluid.

With continued reference to FIG. 1, the sampling device further includes a second cleaning assembly 620 and a second exit passageway 450. The second purging assembly 620 is disposed on the second sampling channel 410 below the second restrictor 420, the second exhaust channel 450 is disposed on the second sampling channel 410 above the second restrictor 420, and the second purging assembly 620 is in signal communication with the controller.

The second cleaning assembly 620 may include a second storage tank 621 and a second pump 622, the second storage tank 621 being connected to the second pump 622, and the second pump 622 being connected to the second sampling passage 410. The second storage tank 621 may store therein a cleaning fluid, such as a cleaning liquid or gas. The fluid in the second storage tank 621 is delivered to the second sampling passage 410 by the second pump 622 for a cleaning operation.

When the second indicator signal does not meet the threshold, the controller controls the second cleaning assembly 620 to provide cleaning fluid to the second sampling channel 410 to clean the second restrictor 420 and/or the second sampling channel 410 to restore the second indicator signal to a threshold-meeting state. As an example, the cleaning fluid may be a liquid and may reduce the adhesion of the blockage within the second occluder 420, thereby accomplishing a deoccluding function.

The second discharge channel 450 is disposed on the second sampling channel 410 and communicates with the second sampling channel 410 to discharge the cleaning fluid and the clogging object. The second exhaust channel 450 is further provided with a sixth valve 463, and the sixth valve 463 is in signal connection with the controller. When the second exhaust passage 450 exhausts the cleaning fluid and the blockage, the sixth valve 463 is in an open state. When the second exhaust passage 450 does not need to exhaust the cleaning fluid and the blockages, the sixth valve 463 is in a closed state.

The spare sampling unit 400 further includes a third valve 461 and a fourth valve 462, the third valve 461 and the fourth valve 462 being disposed on the second sampling channel 410. A third valve 461 is disposed above the second restrictor 420 and a fourth valve 462 is disposed below the second sensor 430. Meanwhile, the third valve 461 and the fourth valve 462 divide the second sampling channel 410 into the second washing section 411. Second restrictor 420 and second sensor 430 are both disposed in second wash zone 411.

The third valve 461 and the fourth valve 462 are in signal connection with the controller.

When the second index signal does not meet the threshold, the controller controls the second cleaning assembly 620 to clean the spare sampling unit 400. Specifically, the controller closes the third valve 461, the fourth valve 462, and the sixth valve 463 such that the second sampling channel 410 is partitioned into the second purge segment 411 between the third valve 461 and the fourth valve 462. The controller then controls the second cleaning assembly 620 to operate to supply cleaning fluid into the second cleaning zone 411, which can unblock the second restrictor 420. After the cleaning is completed, the sixth valve 463 is opened, and the cleaning fluid and the blockage can be discharged from the second discharge passage 450 in time, so that the second flow restrictor 420 is restored to the conducting state.

It is understood that the first cleaning assembly 610 and the second cleaning assembly 620 may be two cleaning assemblies which are independently arranged, that is, the first cleaning assembly 610 is used for cleaning the main sampling unit 200, and the spare sampling unit 400 cannot be cleaned; the second cleaning assembly 620 is used for cleaning the standby sampling unit 400, but not the main sampling unit 200. Of course, the first cleaning assembly 610 and the second cleaning assembly 620 may also be the same cleaning assembly and may clean both the primary sampling unit 200 and the backup sampling unit 400.

With continued reference to fig. 1, the sampling device further includes a heating element 800, and the heating element 800 is disposed on the first sampling channel 210 and/or the second sampling channel 410 for heating the first sampling channel 210 and/or the second sampling channel 410. Specifically, the heating assembly 800 is disposed on the first sampling channel 210; alternatively, the heating assembly 800 is disposed on the second sampling channel 410; alternatively, the heating element 800 is disposed on the first sampling channel 210 and the second sampling channel 410.

As described above, in the process of cleaning the main sampling unit 200 by the first cleaning component 610, the controller starts the heating component 800, the temperature in the first cleaning section 211 can be raised by the action of the heating component 800, a high-temperature positive pressure is formed in the first cleaning section 211, and the cleaning fluid can be timely discharged from the first discharge channel 250 under the action of the high-temperature positive pressure, so as to further promote the discharge of the cleaning fluid and the blockage.

In the process of cleaning the standby sampling unit 400 by the second cleaning component 620, the controller starts the heating component 800, the temperature in the second cleaning section 411 can be raised through the action of the heating component 800, high-temperature positive pressure is formed in the second cleaning section 411, the cleaning fluid can be discharged from the second discharge passage 450 in time under the action of the high-temperature positive pressure, and the discharge of the cleaning fluid and the blockage is further promoted.

In an embodiment, the heating assembly 800 is disposed below the first restrictor 220 and/or the second restrictor 420.

With continued reference to fig. 1, one end of the first sampling channel 210 has a first sampling port 212, and the first sampling port 212 is disposed away from the apparatus 900. The distance D1 between the first flow restrictor 220 and the first sampling port 212 is between 9cm and 11cm.

One end of the second sampling channel 410 has a second sampling port 412, and the second sampling port 412 is located remotely from the device 900. The distance D2 between the second restrictor 420 and the second sampling port 412 is between 9cm and 11cm.

In the present embodiment, the distance between the first restrictor 220 and the first sampling port 212 and the distance between the second restrictor 420 and the second sampling port 412 are both limited to be in the range of 9cm to 11cm, and in such a range, the probability of the restrictor being blocked can be effectively reduced.

It should be noted that the "signal connection" in this application may include a wired connection and a wireless connection. Wherein the wireless connection may include, but is not limited to, a bluetooth connection or a wifi connection.

As shown in fig. 2, fig. 2 is a flowchart illustrating a sampling method according to an embodiment of the present application. The sampling method of the embodiment of the application is applied to any one of the sampling devices, and comprises the following steps:

step S102, introducing a sample into the sampling device, starting the main sampling unit 200, and closing the standby sampling unit 400;

step S104, the first sensor 230 sends a first index signal of a sample in the main sampling unit 200 to the controller, and when the first index signal does not meet a threshold, the controller turns off the main sampling unit 200 and turns on the standby sampling unit 400;

in step S106, the controller controls the conducting state of the spare sampling unit 400 according to the second index signal of the spare sampling unit 400.

In the sampling method according to the embodiment of the application, by adding the standby sampling unit 400, when the first current limiter of the main sampling unit 400 is blocked, the standby sampling unit 400 can be started, and the main sampling unit 200 is closed, so that the sampling operation can be continued. Compared with the method of replacing parts in the related art, the sampling method of the embodiment of the application can improve the problem of equipment abnormity caused by blockage of the current limiter.

In some embodiments, the sampling method of the embodiments of the present application further includes:

when the first index signal does not meet a threshold value, the controller controls the first cleaning assembly to clean the main sampling unit.

Specifically, when the first indicator signal does not meet the threshold, the controller closes the first valve 261, the second valve 262, and the fifth valve 263 such that the first sampling channel 210 is divided into the first purge segment 211 between the first valve 261 and the second valve 262. The controller then controls the first cleaning assembly 610 to operate to supply a cleaning fluid into the first cleaning zone 211, which can unblock the first restrictor 220. After the cleaning is completed, the controller turns on the heating element 800 and the fifth valve 263, and the temperature in the first cleaning section 211 can be raised by the action of the heating element 800, so that a high-temperature positive pressure is formed in the first cleaning section 211, and the cleaning fluid can be discharged from the first discharge passage 250 in time under the action of the high-temperature positive pressure.

In an embodiment, the sampling method according to the embodiment of the present application further includes:

after the first cleaning component 610 cleans the main sampling unit 200, the controller starts the main sampling unit 200;

when the first indicator signal meets the threshold, the controller turns off the first cleaning component 610;

when the first indicator signal does not meet the threshold, the controller continues to turn on the first cleaning component 610.

In this embodiment, after performing the washing step, the controller may open the first valve 261 and the second valve 262, so that the main sampling unit 200 starts sampling. By determining whether the first indicator signal obtained by the first sensor 230 meets the threshold, it can be determined whether the first current limiter 220 is completely cleaned, i.e. whether the first current limiter 220 is in a conducting state and is not blocked.

For example, when the index signal obtained by the first sensor 230 is a pressure signal, the threshold value is between 1kpa and 5kpa. After the cleaning step, if the pressure value obtained by the first sensor 230 is 7kpa, it can be determined that the first restrictor 220 is not completely unblocked, and the cleaning step needs to be continued. After a plurality of cleaning steps, if the pressure value obtained by the first sensor 230 is 3kpa, it can be determined that the first restrictor 220 has been opened, and the cleaning step is stopped.

In one embodiment, the controller controls the on state of the spare sampling unit according to a second index signal of the spare sampling unit, and includes:

after the main sampling unit 200 is turned off and the standby sampling unit 400 is turned on;

when the second indicator signal does not meet the threshold, the controller turns off the spare sampling unit 400.

In this embodiment, if the second indicator signal does not meet the threshold value during the sampling process using the standby sampling unit 400, that is, the second current limiter 420 of the standby sampling unit 400 is also blocked and the blocking condition exceeds the allowable range, the controller may close the standby sampling unit 400 and turn on the main sampling unit 200 again, so that the sampling operation can be continuously performed, and the normal operation of the device 900 is not affected.

It should be noted that when the standby sampling unit 400 is activated due to the blockage of the first current limiter 220, a cleaning step needs to be performed in time, and the first current limiter 220 needs to be cleared, so that the main sampling unit 200 can be activated again at any time when the second current limiter 420 is blocked.

In an embodiment, the sampling method according to the embodiment of the present application further includes:

when the second index signal does not meet the threshold, the controller controls the second cleaning component 620 to clean the spare sampling unit 400.

Specifically, when the second indicator signal does not meet the threshold, the controller closes the third valve 461, the fourth valve 462, and the sixth valve 463 such that the second sampling channel 410 is partitioned into the second wash segment 411 between the third valve 461 and the fourth valve 462. The controller then controls the second cleaning assembly 620 to operate to supply cleaning fluid into the second cleaning zone 411, which can unblock the second restrictor 420. After the cleaning, the controller opens the heating element 800 and the sixth valve 463, and the temperature in the second cleaning section 411 can be raised by the action of the heating element 800, and a high-temperature positive pressure is formed in the second cleaning section 411, so that the cleaning fluid can be discharged from the second discharge passage 450 in time under the action of the high-temperature positive pressure.

In an embodiment, the sampling method according to the embodiment of the present application further includes:

after the second cleaning component 620 cleans the standby sampling unit 400, the controller starts the standby sampling unit 400;

when the second index signal meets the threshold, the controller turns off the second cleaning assembly 620;

when the second indicator signal does not meet the threshold, the controller continues to turn on the second cleaning assembly 620.

In this embodiment, after performing the cleaning step, the controller may open the third valve 461 and the fourth valve 462, so that the standby sampling unit 400 starts sampling. By judging whether the second index signal obtained by the second sensor 430 meets the threshold value, it can be determined whether the second current limiter 420 is completely cleaned, i.e., whether the second current limiter 420 is in a conducting state and is not blocked.

In summary, the advantages and beneficial effects of the sampling device and method according to the embodiments of the present application at least include:

the sampling device according to the embodiment of the application, by adding the standby sampling unit 400, when the first current limiter 220 of the main sampling unit 200 is blocked, the standby sampling unit 400 can be enabled, and the main sampling unit 200 can be turned off, so that the sampling operation can be continued. Compared with the mode of replacing parts in the related art, the sampling device of the embodiment of the application can improve the problem of equipment abnormity caused by blockage of the current limiter.

In the application examples, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are used broadly and should be construed to include, for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the examples of the application can be understood by those skilled in the art according to specific situations.

In the description of the embodiments of the present application, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or units must have a specific direction, be configured and operated in a specific orientation, and thus, should not be construed as limiting the embodiments of the present application.

In the description of the present specification, the description of "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the claimed embodiments and is not intended to limit the claimed embodiments, and various modifications and changes may be made to the claimed embodiments by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the applied embodiment shall be included in the protection scope of the applied embodiment.

Claims (19)

1. A sampling device, comprising:

the main sampling unit comprises a first sampling channel, a first current limiter and a first sensor, wherein the first current limiter is arranged on the first sampling channel, and the first sensor is arranged on the first sampling channel and is positioned below the first current limiter and used for obtaining a first index signal of fluid passing through the first sampling channel;

a standby sampling unit comprising a second sampling channel, a second flow restrictor disposed on the second sampling channel, and a second sensor disposed on the second sampling channel and below the second flow restrictor for obtaining a second index signal of the fluid passing through the second sampling channel; and

and the controller is in signal connection with the first sensor and/or the second sensor, and controls the conduction state of the main sampling unit and/or the standby sampling unit according to the first index signal and/or the second index signal.

2. The sampling device of claim 1, further comprising a first purge assembly disposed on the first sampling channel below the first flow restrictor, and a first exhaust channel disposed on the first sampling channel above the first flow restrictor, the first purge assembly in signal connection with the controller.

3. The sampling device of claim 2, further comprising a fifth valve disposed on the first discharge passage and in signal communication with the controller.

4. The sampling device of claim 1, wherein the primary sampling unit further comprises a first valve and a second valve, the first valve and the second valve being disposed on the first sampling channel, the first valve being disposed above the first flow restrictor, the second valve being disposed below the first sensor.

5. The sampling device of claim 4, wherein the first valve and the second valve are each in signal communication with the controller.

6. The sampling device of claim 1, further comprising a second purge assembly disposed on the second sampling channel below the second flow restrictor and a second discharge channel disposed on the second sampling channel above the second flow restrictor, the second purge assembly in signal connection with the controller.

7. The sampling device of claim 6, further comprising a sixth valve disposed on the second vent passage and in signal communication with the controller.

8. The sampling device of claim 1, wherein the backup sampling unit further comprises a third valve and a fourth valve disposed on the second sampling channel, the third valve disposed above the second flow restrictor, the fourth valve disposed below the second sensor.

9. The sampling device of claim 8, wherein the third valve and the fourth valve are each in signal communication with the controller.

10. The sampling device of claim 1, wherein the first indicator signal and/or the second indicator signal comprises a pressure signal and/or a flow signal.

11. The sampling device of claim 1, further comprising a heating assembly disposed on the first sampling channel and/or the second sampling channel, the heating assembly in signal connection with the controller.

12. The sampling device of claim 11, wherein the heating assembly is disposed below the first and/or second flow restrictors.

13. The sampling device of claim 1, wherein one end of the first sampling channel has a first sampling port, and the distance between the first flow restrictor and the first sampling port is between 9cm and 11cm; and/or the presence of a gas in the gas,

one end of the second sampling channel is provided with a second sampling port, and the distance between the second current limiter and the second sampling port is 9-11 cm.

14. A sampling method applied to the sampling device according to any one of claims 1 to 13, wherein the sampling method comprises:

introducing a sample into the sampling device, starting the main sampling unit and closing the standby sampling unit;

the method comprises the steps that a first sensor sends a first index signal of a sample in a main sampling unit to a controller, and when the first index signal does not meet a threshold value, the controller closes the main sampling unit and opens a standby sampling unit;

and the controller controls the conduction state of the standby sampling unit according to the second index signal of the standby sampling unit.

15. The sampling method of claim 14, wherein the method further comprises:

when the first index signal does not meet a threshold value, the controller controls the first cleaning assembly to clean the main sampling unit.

16. The sampling method of claim 15, wherein when the first indicator signal does not meet a threshold, the controller controls a first cleaning assembly to clean the main sampling unit, comprising:

closing the first valve, the second valve and the fifth valve, and controlling the first cleaning assembly to supply cleaning fluid to the first sampling channel;

starting the heating assembly;

the fifth valve is opened and the cleaning fluid and the blockage are discharged from the first discharge passage.

17. The sampling method according to claim 14, wherein the controller controls the conducting state of the spare sampling unit according to the second index signal of the spare sampling unit, and comprises:

closing the main sampling unit and opening the standby sampling unit;

and when the second index signal does not meet the threshold value, the controller closes the standby sampling unit.

18. The sampling method of claim 17, wherein the method further comprises:

and when the second index signal does not meet the threshold value, the controller controls the second cleaning assembly to clean the standby sampling unit.

19. The sampling method of claim 18, wherein when the second indicator signal does not meet a threshold, the controller controls a second cleaning assembly to clean the spare sampling unit, comprising:

closing the third valve, the fourth valve and the sixth valve, and controlling the second cleaning assembly to supply cleaning fluid to the second sampling channel;

starting the heating assembly;

the sixth valve is opened and the cleaning fluid and the blockage are discharged from the second discharge passage.

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